KR100215406B1 - Oil circulating structure for cylinder head - Google Patents

Abstract

The present invention forms two oil passages in a cylinder head having a cylindrical intake valve and an exhaust valve, and then equalizes the intake valves and the exhaust valves disposed on the plurality of cylinders through a plurality of oil ports connected to the oil passages. It relates to an oil circulation structure of the cylinder head capable of supplying oil, which supplies oil independently through a plurality of first oil ports (82, 84, 86) in communication with the first to fourth intake valve (3134) The second oil passage 90 for supplying oil independently through the first oil passage 80 and the plurality of second oil ports 92, 94, 96 communicating with the first to fourth exhaust valves 4144. It is composed of

Description

Oil circulation structure of cylinder head

The present invention relates to an oil circulation structure of a cylinder head, and more particularly, in an engine having a cylindrical intake valve and an exhaust valve, an intake port and an exhaust port are vertically symmetrically disposed to simplify the structure of the cylinder head. It relates to an oil circulation structure.

In general, when looking at the components of the engine for automobiles, a plurality of cylinders are integrally manufactured as a part constituting the engine body, a cylinder block having a water jacket and a coolant passage through which coolant flows is formed between each cylinder. And a cylinder head disposed above the cylinder block to form a combustion chamber together with a piston, including a cylinder head for installing various valve mechanisms, spark plugs, injection valves, and the like, and a crank case for installing a crank shaft.

1 is a perspective view showing a cross-sectional view of a part of a conventional automobile engine, and generally, a cylinder is formed by a rotational force of a crankshaft transmitted through a connecting rod 4 in a cylinder 1 formed integrally with a cylinder block 2. A piston (3) is provided which moves up and down along the wall surface of (1). The combustion chamber provided by the cylinder head (5) and the head of the piston (3) is provided with an intake port (6) via an intake manifold (7). Inhaled air is sucked in.

The air sucked in this way is supplied with fuel through the injection valve to form a mixer, and when the mixer is compressed by the piston (3), it is ignited by the spark plug 16 to rotate the crankshaft by the explosion force generated at this time. Get power.

In addition, in the conventional cylinder head 5, an intake valve 8 for opening the intake port 6 during the intake stroke and an exhaust valve 15 for exhaust gas after the combustion are applied to the springs 9 and 13. And the rocker arms 10 and 14 for driving these valves 8 and 15, the push rod 12 and the valve lifter 18 are sequentially connected, (19) has a structure for driving the intake valve (8) and the exhaust valve (15).

2 is a plan view illustrating a conventional cylinder head, in which an intake valve 8 and an exhaust valve 15 are opened and closed at an upper portion of the cylinder 1, and a cam shaft 19 is mounted to the cylinder head 5. And an oil passage L for supplying oil to the bearing that rotatably supports it.

In the conventional cylinder head having such a configuration, the path for supplying the oil pumped from the oil pan by the oil pump to the oil passage of the cylinder head is long and complicated, and the oil is equalized by four cylinders by a valve driving device installed in the cylinder head. It is very difficult to distribute them.

The present invention devised to solve this problem is to form two oil passages in the cylinder head having a cylindrical intake valve and exhaust valve, and then on a plurality of cylinders through a plurality of oil ports connected to the oil passage An object of the present invention is to provide an oil circulation structure of a cylinder head capable of supplying oil evenly to an intake valve and an exhaust valve disposed.

1 is a cross-sectional perspective view of a portion of a conventional automobile engine

2 is a plan view showing the configuration of a conventional cylinder head

Figure 3 is a perspective view showing the overall configuration of the engine for automobiles according to the present invention

4 is a plan view showing the configuration of a cylinder head according to the present invention;

* Description of the symbols for the main parts of the drawings *

20: crankshaft 22: connecting rod

24: piston 26: timing gear

28: timing belt 30: intake valve shaft pulley

3134: 14th Intake Valve 36: Intake Valve Shaft

38, 48: bearing 40: exhaust valve shaft pulley

4144: 14th: exhaust valve 46: exhaust valve shaft

5154: Cylinder 14: Water Jacket

58: cylinder head gasket 6164: 14th intake port

66: manifold gasket 68: bulkhead

7174: 14th exhaust port 80: the first oil passage

82, 84, 86: 1st oil port 90: 2nd oil passage

92, 94, 96: 2nd oil port

An object of the present invention described above is equipped with an intake valve shaft pulley and an exhaust valve shaft pulley driven by the rotational force of a timing gear transmitted through a timing belt, and an intake valve shaft pulley and an exhaust valve shaft pulley at one end thereof, and a cylinder in the center thereof. A cylinder head comprising an intake valve shaft and an exhaust valve shaft in which the first to fourth intake valves and the first to fourth exhaust valves each are integrally formed, the plurality of first communicating with the first to fourth intake valves. And a second oil passage for supplying oil independently through a plurality of second oil ports communicating with the first to fourth exhaust valves, and a first oil passage for supplying oil independently through an oil port. Is achieved by the oil circulation structure of the cylinder head.

According to the present invention, since the oil is equally supplied to each of the intake valves and the exhaust valves disposed on the respective cylinders by using a plurality of oil ports connected to the intake valves and the exhaust valves, the lubrication performance can be increased.

Hereinafter, the oil circulation structure of the cylinder head according to the preferred embodiment of the present invention will be described in detail with reference to FIGS. 3 and 4.

Figure 3 is a perspective view showing the overall configuration of a vehicle engine according to the present invention, Figure 4 is a plan view showing the configuration of a cylinder head according to the present invention.

First, as shown in FIG. 3, when looking at the overall configuration of the engine employed in the present invention, a crank shaft 20 in which a plurality of pistons 24 are rotatably mounted by the connecting rod 22 and a crank shaft An intake valve shaft pulley 30 and an exhaust valve shaft pulley 40 driven by the rotational force of the timing gear 26 fitted to one end of the 20 and the timing gear 26 transmitted through the timing belt 28; In one end, an intake valve shaft pulley 30 is mounted, an intake valve shaft 36 having a cylindrical first to fourth intake valve 3134 integrally formed therein, and an exhaust valve shaft 46 at one end thereof. It is mounted, the center is composed of an exhaust valve shaft 46 formed integrally with the first to fourth exhaust valve 4144 of the cylindrical shape.

Here, the timing belt 28 is pressurized by the tensioner 76. In addition, the diameters of the intake valve shaft pulley 30 and the exhaust valve shaft pulley 40 which rotate the intake valve shaft 36 and the exhaust valve shaft 46 are larger than the diameter of the timing gear 26, so that the diameter is sufficient. The reduction ratio was obtained to selectively open the first to fourth intake valves 3134 and the first to fourth exhaust valves 4144 in the order of valve opening and closing.

Next, Figure 4 is a plan view showing the configuration of a cylinder head according to the present invention.

As shown, at one end of the intake valve shaft 36 and the exhaust valve shaft 46 of the present invention, the intake valve shaft pulley 30 and the exhaust valve shaft pulley operated by the rotational force transmitted by the timing belt 28. 40 is mounted, and the first to fourth intake valves 3134 and the first to fourth exhaust valves 4144 having a cylindrical shape are integrally formed at the center thereof, and these valves 3134 and 4144 are integrally formed. Bearings 38 and 48 are sandwiched therebetween.

Here, the first to fourth cylinders 5504 are sequentially formed in the cylinder block disposed below the cylinder head 50, and the first intake ports of the present invention are respectively formed on the upper portions of the cylinders 5164. The fourth intake port 6164 and the first to fourth exhaust ports 7714 are sequentially arranged. Further, these intake ports 6164 and exhaust ports 7142 are selectively opened by cylindrical intake valves 3134 and exhaust valves 4144 to intake intake air or discharge exhaust gas after combustion.

For the sake of understanding, let's take a look at the open state of the valve according to the explosive order (1 → 3 → 4 → 2 → 1) of the 4-stroke engine. For example, in the case where the fourth cylinder 54 is an intake stroke, for example, only the fourth intake valve 34 is opened and all the remaining intake valves 3133 are kept closed. The fourth cylinder 54 is supplied to the fourth cylinder 54 through the fourth intake port 34.

At this time, in the case of the first cylinder 51 and the third cylinder 53, respectively, since the explosion and compression state, the intake valves 31 and 33 and the exhaust valve 41 disposed above the cylinders 51 and 53, respectively. , 43) are all closed. In addition, since the second cylinder 52 is in the exhausted state, the second exhaust valve 42 is opened, so that the burned gas is discharged to the outside through the exhaust manifold through the second exhaust port 72.

In the cylinder head 50 having such a configuration, the oil circulation structure of the present invention for equally supplying oil to the intake valve 3134, the exhaust valve 4144, and the bearings 38, 48, which are lubrication parts, is provided. In the configuration, the first oil passage 80 for independently supplying oil through a plurality of first oil ports 82, 84, and 86 communicating with the first to fourth intake valves 3134, and the first to fourth intake valves 3134. A second oil passage 90 for supplying oil independently through a plurality of second oil ports (92, 94, 96) in communication with the fourth exhaust valve (4144).

Therefore, it is possible to distribute oil evenly to the intake valve 3134 and the exhaust valve 4144 independently through a plurality of oil ports. In addition, oil can be supplied to the bearings 38 and 48 for rotatably supporting the intake valve shaft 36 and the exhaust valve shaft 46 by using separate oil ports 88 and 98, respectively. It was configured to be.

The oil circulation structure of the cylinder head according to the present invention described above uses a plurality of oil ports connected to the intake valve and the exhaust valve to supply oil evenly for each intake valve and the exhaust valve disposed on each cylinder, thereby improving lubrication performance. It has an effect that can be increased.

Claims (2)

An intake valve shaft pulley 30 and an exhaust valve shaft pulley 40 driven by the rotational force of the timing gear 26 transmitted through the timing belt 28, and one end of the intake valve shaft pulley 30 and the exhaust valve. The shaft pulley 40 is mounted, and an intake valve shaft 36 and an exhaust valve shaft are formed integrally with the first to fourth intake valves 3134 and the first to fourth exhaust valves 4144 each having a cylindrical shape. In the oil circulation structure of the cylinder head comprising (46), A first oil passage 80 which independently supplies oil through a plurality of first oil ports 82, 84, and 86 communicating with the first to fourth intake valves 3134, and the first to fourth And a second oil passage (90) for supplying oil independently through a plurality of second oil ports (92, 94, 96) in communication with the exhaust valve (4144). An oil port (88) or (98) for supplying oil to the bearings (38) and (48) for rotatably supporting the intake valve shaft (36) and the exhaust valve shaft (46), respectively. Oil circulating structure of the cylinder head characterized in that it further comprises.